Pioneer xra 4800 service manual

Page 1

[Digger

Service
Manual - -

STEREO CD CASSETTE DECK RECEIVER

XR-A6800

XR-A48OO

THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Model
XR-AGBOO XR-A4800
MYXJ O Q A0220-230V

NVXJ - Q Aczsov

. ORDERNO.
I RRV2328

Type Power Requirement Remarks

CONTENTS
1. SAFETY INFORMATION ------------------------- 7. GENERAL INFORMATION
2. EXPLODED VIEWS AND PARTS LIST ------- 3 7.1 DIAGNOSIS -----
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM 16 7.1.1 DISASSEMBLY -----

4. PCB CONNECTION DIAGRAM ---------- 32 7.2 PARTS ------
5_ PCB PARTS LIST .............................. 46 7_2_1 IC ...... ..
6. ADJUSTMENT ..................................................... 53 722 DISPLAY ............................................... 67

8. PANEL FACILITIES AND SPECIFICATIONS 69

PIONEER CORPORATION 4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, Japan
PIONEER ELECTRONICS SERVICE, INC. P.O. BOX 1760, Long Beach, CA 90801-1760, U.S.A.
PIONEER EUROPE NV Haven 1087, Keetberglaan 1, 9120 Meisele, Belgium

PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936

© PIONEER CORPORATION 2000
T - IZK JULY 2000 Printed in Japan

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XR-A6800, XR-A4800

1. SAFETY INFORMATION

This service manual is intended for qualified service technicians ; it is not meant for the casual do-it-
yourselfer. Qualified technicians have the necessary test equipment and tools, and have been trained
to properly and safely repair complex products such as those covered by this manual.

Improperly performed repairs can adversely affect the safety and reliability of the product and may
void the warranty. If you are not qualified to perform the repair of this product properly and safely, you
should not risk trying to do so and refer the repair to a qualified service technician.

- WARNING!
THE AEL (ACCESSIBLE EMISSION LEVEL) OF THE LASER POWER OUTPUT IS LESS THAN CLASS 1
BUT THE LASER COMPONENT IS CAPABLE OF EMITTING RADIATION EXCEEDING THE LIMIT FOR
CLASS 1.

A SPECIALLY INSTRUCTED PERSON SHOULD DO SERVICING OPERATION OF THE APPARATUS.

LASER DIODE CHARACTERISTICS 7
MAXIMUM OUTPUT POWER: 5 mW
WAVELENGTH: 780 nm to 785 nm

LABEL CHECK (For MYXJ and NVXJ Types)

Printed on the Rear Panel MYXJ Type

VAROI

watt-au- j. suujllukitus unit-zu-

esil olet nun. nakynttomltla

hsarslt-Llylln. Au kltsu stunt-en
vwlncl

mynuq lunarltruninq nu d-nnl an

Ir app: och lplrrln .z urkoppl-d

can. .] .un-n. wamJ

CLASS I

LASER PRODUCT

CAUTION
INVISIBLE LASER
RADIATION WHEN OPEN,
AVOID EXPOSURE
TO BEAM PRWIOIS

NVXJ Type

Additional Laser Caution
1. Laser Interlock Mechanism

ADVARSEL
USYNLIG LASERSTRALIMG VED ABNIVG NAN SIKKERHED SAP
5mm El? VDE AF FUAKTION
UNDGA L/DSKITELSE FOR STRALIAG

VORSICHTI
UNSICHTBARE mm smNIvAo TRIWAJS,WEAN DECKE.
IODER KLAPPEI GEOFFNET lSTl NIw new STRANIAUSSEZENI

wwmsa

MYXJ Type

The position of the switch ($9501) for detecting loading
state is detected by the system microprocessor, and
the design prevents laser diode oscillation when the
switch (89501) is pressed physically.

Thus, the interlockvvill no longerfunction if the switch (89501)
is released physically and deliberatery.

The interlock also does not function in the test mode *.
Laser diode oscillation will contInue, if pin 1 of
CXA1821M (lCSlOl) on the CD ASSY mounted on the
$M Loading Mechanism assembly is connected to GND,
or else the terminals of 08101 are shorted to each other
(fault condition).

. When the cover is opened, close viewing of the objective

lens with the naked eye will cause exposure to a Class
1 laser beam.

* :Referto page 61.